SG1000Pause.cc

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#include "SG1000Pause.hh"
#include "Event.hh"
#include "SDLKey.hh"
#include "MSXCPU.hh"
#include "MSXEventDistributor.hh"
#include "MSXMotherBoard.hh"
#include "checked_cast.hh"
#include "serialize.hh"
 
namespace openmsx {
 
SG1000Pause::SG1000Pause(const DeviceConfig& config)
        : MSXDevice(config)
        , Schedulable(getMotherBoard().getScheduler())
{
        getMotherBoard().getMSXEventDistributor().registerEventListener(*this);
}
 
SG1000Pause::~SG1000Pause()
{
        getMotherBoard().getMSXEventDistributor().unregisterEventListener(*this);
}
 
void SG1000Pause::signalMSXEvent(const Event& event, EmuTime::param time) noexcept
{
        visit(overloaded{
                [&](const KeyDownEvent& keyEvent) {
                        if (keyEvent.getKeyCode() == SDLK_F5) {
                                setSyncPoint(time);
                        }
                },
                [](const EventBase&) { /*ignore*/ }
        }, event);
}
 
void SG1000Pause::executeUntil(EmuTime::param /*time*/)
{
        // We raise and then immediately lower the NMI request. This still triggers
        // an interrupt, since our CPU core remembers the edge.
        MSXCPU& cpu = getMotherBoard().getCPU();
        cpu.raiseNMI();
        cpu.lowerNMI();
}
 
template<typename Archive>
void SG1000Pause::serialize(Archive& ar, unsigned /*version*/)
{
        ar.template serializeBase<MSXDevice>(*this);
}
INSTANTIATE_SERIALIZE_METHODS(SG1000Pause);
REGISTER_MSXDEVICE(SG1000Pause, "SG1000Pause");
 
} // namespace openmsx